IMPROVEMENT OF FLATNESS OF THERMOPLASTIC FILM

Japanese Patent JP3830107

B2

PURPOSE: To improve the flatness of a thermoplastic film without requiring high equipment cost by individually setting temp. corresponding to the flatness of a film by laterally dividing the far infrared heater of a roller heating process.
CONSTITUTION: A flatness improving film manufacturing apparatus has a sending-out roll 10 and a taking-up roll 20 for a thermoplastic film. A flatness improving device 30 has a heating chamber 31 and a cooling chamber 32 both of which are adjacent each other. A heating roller group 34 wherein a large number of heating rollers 33 are arranged side by side on an almost same plane is provided in the heating chamber 31 and a cooling roller group 36 wherein cooling rollers are arranged side by side on an almost same plane is arranged in the cooling chamber 32 to be arranged in succession to the roller group 34. A hot air supply port 37 is provided to the heating chamber 31 and hot air (a) is supplied into the heating chamber from the hot air supply port 37 to heat the heating rollers by convection. A cooling air supply port 38 is provided to the cooling chamber 32 to supply cooling air (b) into the cooling chamber to cool the cooling rollers by convection. A far infrared heater 40 is provided in the heating chamber 31 to heat the heating rollers by radiation.

Hiroshi Nakajima
Kunihira Seto
Takashi Takeuchi

JP30844094A

October 04, 2006

November 18, 1994

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Fuji Photo Film Co., Ltd.

B29C71/00; B29L7/00; (IPC1-7): B29C71/00; //B29K101:12; B29L7:00

JP4152125A
JP5051626U
JP6114866A
JP61192526A
JP3158225A
JP3161319A
JP51041068A
JP63114632A
JP3055232A
JP47003196B1
JP55025392A

Shohei Oguri
Hironori Honda
Toshimitsu Ichikawa
Takeshi Takamatsu

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